package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.google.gson.JsonObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.apache.http.client.HttpClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    public static String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";

    public User wxLogin(UserLoginDTO userLoginDTO) {
        String code=userLoginDTO.getCode();
        String openid=getOpenid(code);

        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        User user=userMapper.getByOpenid(openid);

        if(user==null){
            user=User.builder().openid(openid).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }

        return user;
    }


    private  String getOpenid( String code ){
        Map<String,String> map=new HashMap();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String json=HttpClientUtil.doGet(WX_LOGIN,map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid=jsonObject.getString("openid");
        return openid;
    }

}
